41I don’t know the reason________Michael didn’t come yesterday.
A.why
B.how
C.when
D.which
开始考试练习点击查看答案42She studied very hard at school when she was young,________contributed to her success in later life.
A.so that
B.therefore
C.that
D.which
开始考试练习点击查看答案43The only thing________bothered Chris was that his boss never replied to his email.
A.which
B.that
C.what
D.why
开始考试练习点击查看答案44________is known to all, English is one of the most widely used languages in internationalcommunication.
A.As
B.Which
C.That
D.Who
开始考试练习点击查看答案45Words are windows________you can look into the past.
A.throughwhich
B.through that
C.which
D.whose
开始考试练习点击查看答案46The boy________you met at the party came here again this morning.
A.whom
B.which
C.where
D.when
开始考试练习点击查看答案47We are living in an age________many things are done by computer.
A.that
B.which
C.why
D.when
开始考试练习点击查看答案48We should learn from those________are always ready to help others.
A.who
B.whom
C.they
D.that
开始考试练习点击查看答案49He is a man of great knowledge,________much can be learned.
A.in whom
B.about whom
C.from whom
D.whom
开始考试练习点击查看答案50This is the ball________he broke the window of his school.
A.that
B.with which
C.which
D.of what
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